ToneDef (DTMF Tone Dialer)

11/8/2019

- Implements modern Android permission requests
- Improved accuracy of one-shot sounds
- Added better error checking for some operations
- Cleaned up some of the code

PREVIOUSLY:
- Changes to appease the Play Store
- Tone playback is now more stable on long presses. (Thanks, tildearrow!)
- Sequence dialing now parses extended DTMF; no longer forces digits-only input. (Thanks, Tomino2112!)